
AI Data Centers Are Moving From Air Cooling to Liquid Cooling
Data centers use water to cool air, not chips. The water chills the air that gets blown across the racks, and that is where it evaporates. Remove the air and you remove most of the water. Simon Jesenko runs Iceotope, which builds cooling with no fans and no air at all. Fifteen to twenty litres of refined oil circulating inside a sealed chassis, touching every component. His point about the headlines: they describe air-cooled facilities, and the industry is moving off them. Once a site runs fully liquid-cooled, he says consumption drops immensely. He explains: - Why direct-to-chip cooling only solves 80 percent of the problem, and what stays hot - What the dielectric liquid actually is, where it comes from, and why Shell and Exxon make it - Why early liquid cooling installs leaked, and what that did to the industry's appetite for risk - Why the power supply unit, not the GPU, is where his technology wins - Why crypto miners proved immersion cooling years before data centers Please enjoy the show. -- Chapters (00:00) Introduction to data center cooling challenges (01:07) Water usage in data centers compared to agriculture and other industries (03:00) Basics of open loop and closed loop cooling systems (04:18) Guest introduction: Simon Jesenko of Isotope (05:02) Misconceptions about data center cooling technology (06:08) Evolution from air cooling to liquid cooling in data centers (07:31) Direct-to-chip cooling technology explained (08:40) Water consumption in traditional vs modern data centers (10:29) Market transition towards fully liquid cooled data centers (12:23) Airflow management and chip-level cooling techniques (13:34) Environmental factors influencing data center placement (15:50) Challenges of integrating liquid cooling into existing hardware (19:02) Future-proofing with system-level liquid cooling (22:02) Immersion cooling history and applications in crypto mining (23:25) What is dielectric liquid and its environmental impact (26:50) Adoption and market opportunities for Isotope’s technology (30:56) Optimizing power distribution with liquid cooling (34:15) Industry trends and next steps in liquid cooling technology (37:24) Capacities and limits of current cooling technologies (40:26) Guest question: How has AI replaced daily activities? -- Learn more about Iceotope: https://www.iceotope.com/ Thinking on Paper: ◼ Choose your own technology adventure: https://www.thinkingonpaper.xyz ◼ Running a tech conference? Book us to host: https://www.thinkingonpaper.xyz/tech-conference-host-moderators/ ◼ Listen on Spotify: https://open.spotify.com/show/00volKqMsQntToeho35W47 ◼ Listen on Apple Podcasts: https://podcasts.apple.com/us/podcast/thinking-on-paper-technology-considered/id1713227258 ◼ Follow Mark: https://www.linkedin.com/in/markfielding99/ ◼ Follow Jeremy: https://www.linkedin.com/in/jeremygilbertson/



